Friction-gearing.



-No."'730,678. I PATENTED JUNE 9, 19os.'

L. MAURER. FRICTION GEARING.

APPLICATION FILED MAY 16, 1902.

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UNITED STATES Patented June 9, 1903.

PATENT OFFICE.

LUDWIG MAURER, OF NUREMBERG, GERMANY, ASSIGrNOR TO NURNBERGERMOTORFAHRZENGE FABRIK UNION, G. M. B. I-I., OF NUREMBERG, BA-

VARIA, GERMANY.

FRICTION-GEARING.

SPECIFICATION forming part of Letters Patent No. 730,678, dated June 9,1903. Application filed May 15, 1902. Serial No. 107,446 (No model.)

To all whom/it may concern.-

. Be it known that I, LUDWIGMAURER, asubject of the Emperor of Germany,and aresident of Nuremberg, Bavaria, Germany, have invented certain newand useful Improvements in Friction-Gearing, of which the following is aspecification.

A double fiat-disk friction-wheel gearing in which two friction-wheelsare compressed between two opposed friction-disks is already known. Thedouble fiat-disk friction-wheel gearing which forms the object of thepresent invention has, however, many advantages over those alreadyknown.

In the improved double flat-disk frictionwheel gearing which forms theobject of the present application only one of the fiat disks is drivenfrom the motor, and the change of gear is efiected by the displacementof only one of the friction-wheels,whereby the whole gearing isconsiderably simplified and the force necessary for adjusting thefrictionwheel is rendered comparatively light in spite of the doubledriving of the latter. lowing arrangement, one form of construction ofwhich is shown in the accompanying drawing, is adopted for obtainingthis action.

In the drawing the figure is asectional plan view.

A fiat disk b is fixed on the inner end of a motor crank-shaft a. Infront of this disk and parallel to it a shaft d is mounted on thecarframe a, which shaft is to be driven with a variable speed and onwhich shaft a frictionwheelfis longitudinally adjustably mounted bymeans of a key engaging in a groove 6. On the same shaft afriction-wheel h is revolubly mounted between set rings or collars g,which wheel, like the friction-wheel f, is in contact with the flat diskb. On the other side of the shaft (1 a second flat disk 2 is revolublymounted opposite the first-named flat disk b and bearing with itsfriction-surface also on the peripheries of the friction-wheels f andit. While the friction-wheel is, as already stated, axially adjustablebetween the two fiat disks Z) and o, the friction-Wheel h, which isimmovably mounted and faces the The fol friction-wheel), is always atthe outer end of the flat disks.

The rotation imparted by the motor to the flat disk 71' is transmitteddirectly to the adjustable friction-wheel f and also, by means of thenon-adjustable friction-wheel h, to the flat disk 1;, which imparts thisrotation also to the friction-wheel f. As both flat disks 1) and 'ialways rotate at a similar speed, but in opposite directions, theadjustable frictionwheel f, clamped between the two disks, is driven attwo diametrically opposite points uniformly and in similar directions ofrotation, so that also even in the case of low gears-that is, to say,when the friction-wheel f approaches the center of the flat disks-thetransmission of movement to the shaft (1 to be driven takes place withcertainty. According to the position of the friction-wheel f between thedisks the shaft 61 transmits the motion of the motor-shaft aby means ofchainwheel gear is or the like with a greater or smaller speed oftransmission to the drivingaxle of the vehicle.

The two fiat disks 1) and i may be pressed against the friction-wheels fand h from the drivers seat by pulling a rod Z, which acts by means oflink-bars m and n on the one hand on the end of a lever 0 and on theother hand on the end of a lever 19. The lever 0 engages with a collaror the like on the motor-shaft a, and the double lever 19 similarly actsupon the rotary axle q of the disk i in such a Way that when the rod Zis drawn back the shaft a and the axle q are pushed inward, andconsequently the fiat disks 1) and i are pressed against the peripheriesof the friction-wheels f and it, while when the pull on the rod-Z ceasesthe pressure ceases, and thus the transmission of movement isinterrupted.

The axial displacement of the frictionwheel f may also be effected bymeans of an arm .9 pivotally engaging the hub r of the friction-wheel,which arm .9 is firmly connected with a screw-spindle t. On thisscrewspindle a nut to is seated, which is revolubly mounted on thecar-frame c, and which nut may be rotated from the drivers seat-forsecond wheel splined on said shaft and hav"- ing its periphery incontact with the faces of both said disks, and means for moving saidsecond wheel on the shaft and means for moving the disks into and out ofcontact with the wheels, substantially as described.

In witness whereof I have hereunto set my 20 hand in presence of twowitnesses.

LUDVVIG MAURER.

Witnesses:

ANDREAS STIOH, OSCAR BOOK.

